Correction to: Journal of Occupational Medicine and Toxicology (2018) 13:34.

https://doi.org/10.1186/s12995-018-0217-6

After publication of the original article, the authors reported an error which needed to be corrected:

In the methodology section of the article [1], Fig. 1 and Fig. 2 have been mistakenly published. They exemplify the methodology of the back scan. The correct two figures are listed below. The legends remain the same.

Fig. 1
figure 1

Location of the 6 marker

Fig. 2
figure 2

Group 1: Showing comparative positions 1 / 2